<template>
  <div class="todo-header">
    <input type="text" placeholder="请输入你的任务名称，按回车键确认" v-model="title" @keydown.enter="add"/>
  </div>
</template>

<script>
  import {nanoid} from "nanoid";

  export default {
      name: "TodosHeader",
      data() {
        return {
          title: ''
        }
      },
      methods: {
        add(e) {
          //校验数据
          if (!this.title.trim()) {
            return alert('输入不能为空');
          }

          //将用户输入包装成一个todo对象
          // console.log('this.receive@', this.receive)
          let todoObj = {id:nanoid(), title:e.target.value, done:false}
          // console.log('todoObj@', todoObj)
          //通知App组件去添加一个todo对象
          this.addTodo(todoObj);
          //清空输入
          this.title = '';
        }
      },
      props: ['addTodo']
  }
</script>

<style>
/*header*/
.todo-header input {
  width: 560px;
  height: 28px;
  font-size: 14px;
  border: 1px solid #ccc;
  border-radius: 4px;
  padding: 4px 7px;
}

.todo-header input:focus {
  outline: none;
  border-color: rgba(82, 168, 236, 0.8);
  box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 8px rgba(82, 168, 236, 0.6);
}
</style>